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18673 (1998 FH66)
Classification: Outer Main-belt Asteroid          SPK-ID: 2018673
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09319899493646137 3.3631e-08  
a 3.250831302338643 1.9432e-08 au
q 2.947857092252694 1.0947e-07 au
i .217099729332493 3.7649e-06 deg
node 250.1016470036918 0.0011647 deg
peri 39.70571987057586 0.001165 deg
M 231.3720638416452 2.3343e-05 deg
tp 2459965.432083551135
(2023-Jan-20.93208355)
0.00013872 TDB
period 2140.868914660899
5.86
1.9196e-05
5.256e-08
d
yr
n .1681560218538751 1.5078e-09 deg/d
Q 3.553805512424593 2.1243e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1680  
   data-arc span      10964 days (30.02 yr)  
   first obs. used      1991-01-12  
   last obs. used      2021-01-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53937  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 02:39:30  

Additional Information
 Earth MOID = 1.92961 au 
 Jupiter MOID = 1.58871 au 
 T_jup = 3.175 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.66   n/a E2021B10  
diameter diameter 9.908 km 0.029 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.072   0.013 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

18673 (1998 FH66)          Discovered 1998-Mar-20 by LINEAR at Socorro
Reference: 20001111/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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